diff --git a/simple-mind-map/src/layouts/Timeline copy.js b/simple-mind-map/src/layouts/Timeline copy.js
new file mode 100644
index 00000000..7c7a2a02
--- /dev/null
+++ b/simple-mind-map/src/layouts/Timeline copy.js	
@@ -0,0 +1,390 @@
+import Base from './Base'
+import { walk, asyncRun } from '../utils'
+import { CONSTANTS } from '../utils/constant'
+
+const degToRad = (deg) => {
+  return Math.PI / 180 * deg
+} 
+
+//  时间轴
+class CatalogOrganization extends Base {
+  //  构造函数
+  constructor(opt = {}, layout) {
+    super(opt)
+    this.layout = layout
+  }
+
+  //  布局
+  doLayout(callback) {
+    let task = [
+      () => {
+        this.computedBaseValue()
+      },
+      () => {
+        this.computedLeftTopValue()
+      },
+      () => {
+        this.adjustLeftTopValue()
+      },
+      () => {
+        callback(this.root)
+      }
+    ]
+    asyncRun(task)
+  }
+
+  //  遍历数据创建节点、计算根节点的位置，计算根节点的子节点的top值
+  computedBaseValue() {
+    walk(
+      this.renderer.renderTree,
+      null,
+      (cur, parent, isRoot, layerIndex, index) => {
+        let newNode = this.createNode(cur, parent, isRoot, layerIndex)
+        // 根节点定位在画布中心位置
+        if (isRoot) {
+          this.setNodeCenter(newNode)
+        } else {
+          // 非根节点
+          // 时间轴2类型需要交替显示
+          if (this.layout === CONSTANTS.LAYOUT.TIMELINE2) {
+            // 三级及以下节点以上级为准
+            if (parent._node.dir) {
+              newNode.dir = parent._node.dir
+            } else {
+              // 节点生长方向
+              newNode.dir =
+                index % 2 === 0
+                  ? CONSTANTS.TIMELINE_DIR.BOTTOM
+                  : CONSTANTS.TIMELINE_DIR.TOP
+            }
+          } else {
+            newNode.dir = ''
+          }
+          if (parent._node.isRoot) {
+            newNode.top =
+              parent._node.top +
+              (cur._node.height > parent._node.height
+                ? -(cur._node.height - parent._node.height) / 2
+                : (parent._node.height - cur._node.height) / 2)
+          }
+        }
+        if (!cur.data.expand) {
+          return true
+        }
+      },
+      null,
+      true,
+      0
+    )
+  }
+
+  //  遍历节点树计算节点的left、top
+  computedLeftTopValue() {
+    walk(
+      this.root,
+      null,
+      (node, parent, isRoot, layerIndex, index) => {
+        if (
+          node.nodeData.data.expand &&
+          node.children &&
+          node.children.length
+        ) {
+          let marginX = this.getMarginX(layerIndex + 1)
+          let marginY = this.getMarginY(layerIndex + 1)
+          if (isRoot) {
+            let left = node.left + node.width + marginX
+            let topTotalLeft = left
+            let bottomTotalLeft = left
+            node.children.forEach((cur) => {
+              if (cur.dir === 'top') {
+                cur.left = topTotalLeft
+                topTotalLeft += cur.width + marginX
+              } else {
+                cur.left = bottomTotalLeft
+                bottomTotalLeft += cur.width + marginX
+              }
+            })
+          } else {
+            let totalTop =
+              node.top +
+              node.height +
+              marginY +
+              (this.getNodeActChildrenLength(node) > 0 ? node.expandBtnSize : 0)
+            node.children.forEach(cur => {
+              cur.left = node.left + node.width * 0.5
+              cur.top = totalTop
+              totalTop +=
+                cur.height +
+                marginY +
+                (this.getNodeActChildrenLength(cur) > 0 ? cur.expandBtnSize : 0)
+            })
+          }
+        }
+      },
+      null,
+      true
+    )
+  }
+
+  //  调整节点left、top
+  adjustLeftTopValue() {
+    walk(
+      this.root,
+      null,
+      (node, parent, isRoot, layerIndex) => {
+        if (!node.nodeData.data.expand) {
+          return
+        }
+        // 调整left
+        if (node.isRoot) {
+          // this.updateBrothersLeft(node)
+        }
+        // 调整top
+        let len = node.children.length
+        if (parent && !parent.isRoot && len > 0) {
+          let marginY = this.getMarginY(layerIndex + 1)
+          let totalHeight =
+            node.children.reduce((h, item) => {
+              return (
+                h +
+                item.height +
+                (this.getNodeActChildrenLength(item) > 0
+                  ? item.expandBtnSize
+                  : 0)
+              )
+            }, 0) +
+            (len + 1) * marginY
+          this.updateBrothersTop(node, totalHeight)
+        }
+      },
+      (node, parent, isRoot, layerIndex) => {
+        if (
+          parent &&
+          parent.isRoot &&
+          node.dir === CONSTANTS.TIMELINE_DIR.TOP
+        ) {
+          // 遍历二级节点的子节点
+          node.children.forEach(item => {
+            let totalHeight = this.getNodeAreaHeight(item)
+            let _top = item.top
+            item.top =
+              node.top - (item.top - node.top) - totalHeight + node.height
+            this.updateChildren(item.children, 'top', item.top - _top)
+          })
+        }
+      },
+      true
+    )
+    walk(
+      this.root,
+      null,
+      (node, parent, isRoot, layerIndex) => {
+        if (!node.nodeData.data.expand) {
+          return
+        }
+        // 调整left
+        if (node.layerIndex === 1) {
+          let totalX = 0
+          let totalHeight = 0
+          node.children.forEach((item) => {
+            let h = this.getNodeAreaHeight(item) 
+            let x = (h+ totalHeight) / Math.tan(degToRad(45))
+            totalX += x
+            totalHeight += h
+            item.left += x
+            this.updateChildren(item.children, 'left', x)
+          })
+        }
+      },
+      null,
+      true
+    )
+  }
+
+  //  递归计算节点的宽度
+  getNodeAreaWidth(node) {
+    let widthArr = []
+    let loop = (node, width) => {
+      if (node.children.length) {
+        width += node.width / 2
+        node.children.forEach(item => {
+          loop(item, width)
+        })
+      } else {
+        width += node.width
+        widthArr.push(width)
+      }
+    }
+    loop(node, 0)
+    return Math.max(...widthArr)
+  }
+
+  //  递归计算节点的宽度
+  getNodeAreaHeight(node) {
+    let totalHeight = 0
+    let loop = node => {
+      totalHeight +=
+        node.height +
+        (this.getNodeActChildrenLength(node) > 0 ? node.expandBtnSize : 0) +
+        this.getMarginY(node.layerIndex)
+      if (node.children.length) {
+        node.children.forEach(item => {
+          loop(item)
+        })
+      }
+    }
+    loop(node)
+    return totalHeight
+  }
+
+  //  调整兄弟节点的left
+  updateBrothersLeft(node) {
+    let childrenList = node.children
+    let totalAddWidth = 0
+    childrenList.forEach(item => {
+      item.left += totalAddWidth
+      if (item.children && item.children.length) {
+        this.updateChildren(item.children, 'left', totalAddWidth)
+      }
+      // let areaWidth = this.getNodeAreaWidth(item)
+      let { left, right } = this.getNodeBoundaries(item, 'h')
+      let areaWidth = right - left
+      let difference = areaWidth - item.width
+      if (difference > 0) {
+        totalAddWidth += difference
+      }
+    })
+  }
+
+  //  调整兄弟节点的top
+  updateBrothersTop(node, addHeight) {
+    if (node.parent && !node.parent.isRoot) {
+      let childrenList = node.parent.children
+      let index = childrenList.findIndex(item => {
+        return item === node
+      })
+      childrenList.forEach((item, _index) => {
+        if (item.hasCustomPosition()) {
+          // 适配自定义位置
+          return
+        }
+        let _offset = 0
+        // 下面的节点往下移
+        if (_index > index) {
+          _offset = addHeight
+        }
+        item.top += _offset
+        // 同步更新子节点的位置
+        if (item.children && item.children.length) {
+          this.updateChildren(item.children, 'top', _offset)
+        }
+      })
+      // 更新父节点的位置
+      this.updateBrothersTop(node.parent, addHeight)
+    }
+  }
+
+  //  绘制连线，连接该节点到其子节点
+  renderLine(node, lines, style) {
+    if (node.children.length <= 0) {
+      return []
+    }
+    let { left, top, width, height, expandBtnSize } = node
+    let len = node.children.length
+    if (node.isRoot) {
+      // 当前节点是根节点
+      let prevBother = node
+      // 根节点的子节点是和根节点同一水平线排列
+      node.children.forEach((item, index) => {
+        let x1 = prevBother.left + prevBother.width
+        let x2 = item.left
+        let y = node.top + node.height / 2
+        let path = `M ${x1},${y} L ${x2},${y}`
+        lines[index].plot(path)
+        style && style(lines[index], item)
+        prevBother = item
+      })
+    } else {
+      // 当前节点为非根节点
+      let maxy = -Infinity
+      let miny = Infinity
+      let x = node.left + node.width * 0.3
+      node.children.forEach((item, index) => {
+        let y = item.top + item.height / 2
+        if (y > maxy) {
+          maxy = y
+        }
+        if (y < miny) {
+          miny = y
+        }
+        // 水平线
+        let path = `M ${x},${y} L ${item.left},${y}`
+        lines[index].plot(path)
+        style && style(lines[index], item)
+      })
+      // 竖线
+      if (len > 0) {
+        let line = this.draw.path()
+        expandBtnSize = len > 0 ? expandBtnSize : 0
+        if (
+          node.parent &&
+          node.parent.isRoot &&
+          node.dir === CONSTANTS.TIMELINE_DIR.TOP
+        ) {
+          line.plot(`M ${x},${top} L ${x + 500},${top - Math.tan(degToRad(45)) * 500}`)
+        } else {
+          line.plot(`M ${x},${top + height + expandBtnSize} L ${x},${maxy}`)
+        }
+        node.style.line(line)
+        node._lines.push(line)
+        style && style(line, node)
+      }
+    }
+  }
+
+  //  渲染按钮
+  renderExpandBtn(node, btn) {
+    let { width, height, expandBtnSize, isRoot } = node
+    if (!isRoot) {
+      let { translateX, translateY } = btn.transform()
+      if (
+        node.parent &&
+        node.parent.isRoot &&
+        node.dir === CONSTANTS.TIMELINE_DIR.TOP
+      ) {
+        btn.translate(
+          width * 0.3 - expandBtnSize / 2 - translateX,
+          -expandBtnSize / 2 - translateY
+        )
+      } else {
+        btn.translate(
+          width * 0.3 - expandBtnSize / 2 - translateX,
+          height + expandBtnSize / 2 - translateY
+        )
+      }
+    }
+  }
+
+  //  创建概要节点
+  renderGeneralization(node, gLine, gNode) {
+    let {
+      top,
+      bottom,
+      right,
+      generalizationLineMargin,
+      generalizationNodeMargin
+    } = this.getNodeBoundaries(node, 'h')
+    let x1 = right + generalizationLineMargin
+    let y1 = top
+    let x2 = right + generalizationLineMargin
+    let y2 = bottom
+    let cx = x1 + 20
+    let cy = y1 + (y2 - y1) / 2
+    let path = `M ${x1},${y1} Q ${cx},${cy} ${x2},${y2}`
+    gLine.plot(path)
+    gNode.left = right + generalizationNodeMargin
+    gNode.top = top + (bottom - top - gNode.height) / 2
+  }
+}
+
+export default CatalogOrganization